Pocket tire gauge



Oct. 19, 1937. G. s. lsKYAN POCKET TIRE GAUGE Filed June 9, 1956 NVENTOR eorge S [Skya/z Pwd/Ll mrwmmw ATTORNEYS 2() tion of said gauge;

Patented Oct. 19, 1937 l f e UNITED STATES PATENT QFF'ICE y y 2,096,328 o POCKET yTIRE GAUGE George S. Iskyan, Elmhurst, N. Y. Application June 9, 1936,l Serialy No. 84,268 4 Claims. (Cl. '7S-111) yMy. present invention relates to pocket gauges barrel. The illustrative indicator rod has a for use in ascertaining the air pressure in pneutriangular cross section-24a. :matic tires and other articles. It improves such An apertured disc or washer 25 is secured to gauges bymaking it easier `to calibrate themV at the flanged end of the sleeve and has integral 5, the/,factory and tomaintain the adjustment in prongs 26a bent to extend into the sleeve and 5:'. the finished gauge. Italso provides improved bear against the sides of the indicator rod. This leaf-spring means yfor yieldingly engaging4 the inwasher element is made of a hard springy metal dicator rod of the gauge, which solves the probso that its prongs constitute leaf springs to bear lem of operatively supporting the small leaf- .yieldingly against the side ofthe indicator rod. i spring elementY and at the same time enables it to In the illustrative device, the aforesaid washer 26 10Q- loe-.made outfof springy metal vsuited to the puris stationarily secured to the flanged end of the pose. y sleeve I6 by being seated in a recess I 6a formed l'Ihese and otherobjects of theinvention will in said sleeve-end, the wall of said recess being appear from the following description in connecthen peened over into xed engagement with the tion-With the drawing, disclosing a preferred illusrim portion of the washer.. The aperture 26o of 15:1:

trative embodiment of pocket gauge within the the washer is triangular in shape so as to permit invention. n the indicator rod to slide freely through itrbut In the drawing: vnot to rotate. Fig. 1 is a longitudinal section partly in eleva- A cap 28 vis provided for closing the mouth of thebarrel. This cap is formed with a triangular Fig. 2,1s the upper end of Fig. 1 enlarged and aperture 28a through which the indicator rod furtherl showing the sleeve in `longitudinal seccan-freely slide but not rotate. The cap in the tion, and disclosing the leaf-springmember withfinished gauge `is crimped or is otherwise securable non-rotatably to the mouth-end of the barrel init Figs.` 3 and 4 arecross-sectional views respecandk thereby maintains whatever adjustment has 25 tively on the lines 3:-3 and 4 4 ink Fig. 2 lookbeen given the spiral spring 22 during the calibraing downwardly;A tion of the gauge at the factory. To effect this Fig..5-isacross-sectional view on the line 5 5 factory` adjustment of the spiral spring, the parts infFig. 2 lookingdownwardly on the cap; and, of vthefgauge are assembled as shown in Fig. 1,

30,.: f Fig 61s a, planview of theleaf-sp-ring element except that the cap 28 is not applied. The sleeve 30 on an enlarged scale before its prongs have been I6 is screwed into the right position in the barrel bent up` for use. o to give the right degree of compression to the Referring to thedrawing, the illustrative gauge spiral spring so that the indicator rod gives corcomprises aftubular barrel IU equipped at oner rect readings for variousair pressures applied to end with an apertured head I2 which may-possess the piston through the head of the gauge. Then any desirable external and internal shape and without disturbing said rotary adjustment of the construction for engaging a valve stem and un- Sleeve, the cap 28 is applied to the mouth-end seating the valve in said stem and operatively of the barrel with the indicator rod projecting connecting the barrel of the gauge vand the air through the triangular aperture of the cap. The

40 pressure `indicating'mechanism therein with the rim of the cap is then crimped against the barrel 40 airr pressure in the tire or other article on which so as to be non-rotatably xed thereon. This the valve stem is mounted. maintains the adjustment of the sleeve and there- Within the barrel of the gauge is the usual pisfore of the spring because the triangularly aperton I4. A sleeve I6 is located in the barrel at tured sleeve and cap are threaded by the trianguthe mouth-end thereof, namely the opposite end larly cross sectioned indicator rod so that all 45 thereof from the head I2. This sleeve yhas an three of these parts are mechanically tied tooutwardly directed ange I8 whose periphery is gether (without interfering with the free longiformed with screw threads 2i! which engage corretudinal movement of the rod) but none of said sponding screw threads on the inside of the barparts can rotate independently of the others. The

rel.1 A spiral spring 22 is located under comresult is that the cap being anchored against 50 pression between the piston I4 and the aforesaid rotation in the finished gauge, this serves to iiange I8 of ther sleeve. A calibrated indicator anchor the indicator rod and the sleeve against rod 24 at one end loosely rests on the piston, and rotation whereby the factory adjustment of the extends through the spiral spring and sleeve and spring is maintained.

projects at its other end from the mouth of the It will be understood that the apertures and 55 the cross section of the indicator rod do not have to be triangular but may rhave any other shape or configuration to accomplish the purpose.

The pronged washer is a very effective Way of forming and securing the leaf-spring or springs in operative position. Also it enables metal of suitable springiness to be chosen independently of the kind of metal used in the sleeve. The number of prongs will Vary with the shape of the cross section of the indicator rod. In the illustrative device three are used spaced to bear against the three faces of the rod and thereby keep it centered in the sleeve with the corners of the rod out of Contact with either the wall of the sleeve or the corners of the rim of the aperture in the washer. IIhe three leaf-springs thus loatingly support the rod for free longitudinal movement smoothly responsive to the outward movement of the piston due to the applied air pressure; and of course said springs yieldingly retain the given position of the indicator rod so that its graduations can be read after the gauge has been disconnected from the tire valve.

The mouth I'b of the sleeve may gradually enlarge or expand outwardly as in Fig. 2 to permit the prongs 26a. to pass easily into the main part of the sleeve into yielding face contact with the sides of the indicator rod.

While one illustrative embodiment has been described in detail, it is not my intention to limit the scope of the invention to that particular embodiment or otherwise than by the terms of the appended claims. y

, What I claim is: y

1. In a pocket tire gauge the combination of a tubular barrel equipped at one end with an apertured head for engagement with a tire valve stem, a piston in said barrel toward said head-end thereof, a sleeve in the other end of the barrel, a spiral spring located in the barrel under compression between said piston and sleeve, an indicator rod located within said spiral spring and within said sleeve and resting at one end on the piston and having its other end projecting slidably from the end of the barrel, the sleeve having a screw threaded connection with the inside of the barrel permitting endwise adjustment of the sleeve to adjust the compression of thespirall spring, the sleeve having an internal recess, a disk secured stationarily in said recess, said disk having a non-circular hole through it which is slidably but not rotatably tted by the indicator rod which also has a non-circular cross section.

2. In a pocket tire gauge the combination of a tubular barrel equipped at one end with an apertured head for engagement with a tire valve stem, a piston in said barrel toward said headend thereof, a sleeve in the other end of the barrel, a spiral spring located in the barrel under compression between said piston and sleeve, an indicator rod located within said spiral spring and within said sleeve and resting at one end on the piston and having its other end projecting slidably from the end of the barrel, the sleeve having a screw threaded connection with the inside of the barrel permitting endwise adjustment of the sleeve to adjust the compression of the spiral spring, a disk secured to the end of said sleeve and having resilient prongs extending into Y contact with the sides of the indicator rod, said disk having a hole therein through which the rod slidably projects.

3. In a pocket tire gauge the combination of a tubular barrel equipped at one end with an apertured head for engagement with a tire valve stem, a piston in said barrel toward said headend thereof, a sleeve in the other end of the barrel, a spiral spring located in the barrel underY compressionbetween said piston and sleeve, an indicator rod located within said spiral spring and within said sleeve and resting at one end on the piston and having Yits other end projecting slidably from the end of the barrel, .the sleeve having a screw threaded connection with the inside of the barrel permitting endwise adjustment of,the sleeve to adjust the compression of the spiral spring, a disk secured to the end of said sleeve and having resilient prongs extending into the bore of the sleeve adjacent the wall thereof into contact with the sides of the indicator rod, said disk having a hole therein through which the rod slidably but non-rotatably projects.

4. In a pocket tire gauge the combination of a tubular barrel equipped at one end with an apertured head for engagement with a tire valve stem, a piston in said barrel toward said headend thereof, a sleeve in the other end of the barrel, a spiral spring located in the barrel under compression between said piston and sleeve, an indicator rod located within said spiral spring and Within said sleeve and resting at one end on the piston and having its other end projecting slidably from the end of the barrel, the sleeve j having a screw threaded connection with the inside of the barrel permitting endwise adjustment of the sleeve to adjust the compression of the spiral spring, said sleeve having an internal recess, a disc secured in said recess, said disc having resilient prongs extending into contact with the sides of the indicator rod, said disc having a holeY therein through which the rod projects.

GEORGE S. ISKYAN. 

